MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Powder Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The running temperature of the oil affects the ______ |
| A. | bearing performance |
| B. | bearing life and performance |
| C. | bearing life |
| D. | bearing dimensions |
| Answer» C. bearing life | |
| 2. |
The temperature of oil should not be _______ than the proper running temperature. |
| A. | lower |
| B. | higher |
| C. | equal |
| D. | very low |
| Answer» C. equal | |
| 3. |
Which of the following factors determine the rate of circulation of oil in oil-impregnated bearings? |
| A. | Permeability of the porous bearing |
| B. | Viscosity of the oil |
| C. | Temperature |
| D. | Permeability of the porous bearing, and viscosity of the oil |
| Answer» E. | |
| 4. |
The loss of oil occurs from the _____ in a cylindrical bearing. |
| A. | top |
| B. | cylindrical surface |
| C. | ends |
| D. | bottom |
| Answer» D. bottom | |
| 5. |
Which of the following conditions are necessary for the development of fluid film in porous bearings? |
| A. | Viscosity |
| B. | High speed |
| C. | Low speed |
| D. | High speed and viscosity |
| Answer» E. | |
| 6. |
The life of aluminum bearings is ________ |
| A. | 35 hours |
| B. | > 200 hours |
| C. | 7 hours |
| D. | < 160 hours |
| Answer» C. 7 hours | |
| 7. |
________ bearing is used where soft journal is employed. |
| A. | Brass bearings |
| B. | Aluminum bearing |
| C. | Lead bronze |
| D. | Straight tin bronze |
| Answer» D. Straight tin bronze | |
| 8. |
Which of the following is an alternative to the immersion technique for impregnation of porous bearings? |
| A. | Reducing impregnation |
| B. | Grease impregnation |
| C. | Oxidizing impregnation |
| D. | Vacuum impregnation |
| Answer» E. | |
| 9. |
Oil impregnation of porous bearings is done for _____ minutes. |
| A. | 80 |
| B. | 50 |
| C. | 30 |
| D. | 70 |
| Answer» D. 70 | |
| 10. |
Resin impregnation of porous bearings makes them _________ |
| A. | heat-treatable |
| B. | non-heat treatable |
| C. | reduces density |
| D. | weak |
| Answer» C. reduces density | |